Hattmann68; if you already have the cam, advance it 4 degrees. And use 1.65 rockers on the intake side. While it is apart, make sure you clearence the intake pushrod holes so you won't have inteference. On your pistons, it must be an aftermarket rebuilder special type cast piston. Those things normally are way down in the hole.(.025" +) If the bottom end is together, not much to do. If it isn't, at a min try for different pistons with valve reliefs. Then you can mill the deck to bring the piston to 0 deck. Use the 3.960" Cometic head gaskets. Alot better combustion process and more power compared to the felpro 4.300" bore gaskets.
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